What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) if the film is 214 nm thick?
a. 417 nm
b. 446 nm
c. 406 nm
d. 489 nm
e. 479 nm
a
Physics & Space Science
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Latent Heats: Heat is added to a 3.0 kg piece of ice at a rate of 636.0 kW. How long will it take for the ice at 0.0°C to melt? For water LF = 334,000 J/kg and LV = 2.246 × 106 J/kg.
A. 1.6 s B. 640,000 s C. 0.0 s D. 1000 s
Physics & Space Science
The Earth's lithosphere has broken up into plates because of
A) earthquakes B) tidal forces due to the Moon C) tidal forces due to the Sun D) mantle convection
Physics & Space Science
Applications to Astronomy: Estimate the observed wavelength for the 656 nm line in the spectrum of a star which is 100 million light-years from us if H = 20 
? (c = 3.00 × 108 m/s)
A. 620 nm B. 640 nm C. 660 nm D. 690 nm
Physics & Space Science
The dying glow of the Big Bang is called the ______________
Fill in the blank(s) with correct word
Physics & Space Science